7 Specimen Results

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Phylum

Order

Class

Cephalopoda (4)

Family

Placenticeratidae (1)

Scaphitidae (1)

Genus

Placenticeras (1)

Individual/Organization

Zakrzewski, R.J. (4)

Bretz, R.F. (3)

Beamon, J.C. (1)

Griggs, Cl. (1)

Shelburne, E.C. (1)

Period

Epoch

Age

Formation

Pierre Shale (1)

Member

Sharon Springs (3)

Country

United States of America (7)

State/Province

South Dakota (7)